Lenovo IdeaCentre A7 Series, User Manual, Page: 38 / 41

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User Guide
b. When you change your TV signal from analog to digital, your saved
channel list for analog TV is deleted. When you want to watch analog TV
again, you must create and save a new channel list.
•฀ You฀must฀set฀the฀TV฀tuner฀input฀signal฀to฀analog฀before฀you฀can฀watch฀
Teletext programming.
4.7 Performing Daily Maintenance Tasks
Cleaning the computer components
Because many of the computer components consist of sophisticated integrated
circuit boards, it is very important to periodically clean the computer to prevent
dust buildup. The cleaning supplies you need to clean the components include:
a vacuum cleaner, a soft cotton cloth, pure water (preferably purified or distilled
water) and cotton swabs.
Attention: Before you clean your computer, disconnect the computer
from฀the฀electrical฀outlet.฀Clean฀your฀computer฀with฀a฀soft฀cloth฀
dampened with water. Do not use liquid or aerosol cleaners, which may
contain flammable substances.
Note: To avoid damaging the computer or display, do not spray cleaning
solution directly onto the display. Only use products specifically designed
for cleaning displays, and follow the instructions included with the product.
The following are general methods for cleaning the components:
•฀ You฀can฀use฀a฀soft฀cloth฀to฀remove฀dust฀on฀the฀surface฀of฀the฀computer,฀the฀
monitor, the printer, the speakers and the mouse.
•฀ You฀can฀use฀a฀vacuum฀cleaner฀to฀clean฀in฀otherwise฀inaccessible฀corners.
•฀ To฀clean฀the฀keyboard฀thoroughly,฀shut฀down฀the฀computer฀and฀scrub฀it฀gently฀
with a wet cloth. Do not use the keyboard until it is dry.
Do not do any of the following:
•฀ Allow฀water฀to฀enter฀the฀computer.
•฀ Use฀a฀heavily฀dampened฀cloth.
•฀ Spray฀water฀directly฀onto฀the฀surface฀of฀the฀monitor฀or฀inside฀the฀computer.
LCD monitors should be cleaned daily. Use a dry cloth to brush dust from the
monitor and keyboard every day. Keep all surfaces clean and free of grease stains.